CN204177343U - A kind of self-adapting following device for open grating reading head - Google Patents
A kind of self-adapting following device for open grating reading head Download PDFInfo
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- CN204177343U CN204177343U CN201420477661.9U CN201420477661U CN204177343U CN 204177343 U CN204177343 U CN 204177343U CN 201420477661 U CN201420477661 U CN 201420477661U CN 204177343 U CN204177343 U CN 204177343U
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- reading head
- grating reading
- thick stick
- slip shaft
- pin bushing
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Abstract
The utility model relates to a kind of device of photosignal detection technique field, particularly a kind of self-adapting following device for open grating reading head.Solve existing grating reading head mounting structure not easily to adjust, grating reading head is difficult to the change of self-adaptation extraneous factor and automatically adjusts the problem with the spacing of grating scale.Its technical scheme is a kind of self-adapting following device for open grating reading head of design, comprises spline slip shaft, guide pillar, guide pin bushing, maintenance circle, rolling body, spring, read head mounting base, leads thick stick supporting seat, leads thick stick, grating reading head and bracket component.Not only can be installed on rotary part in the utility model, line slideway is suitable for too, when rail shapes change or ambient temperature change, this open grating reading head self-adaptive hunting gear also can ensure that grating reading head is in optimum Working, and adjustment principle is the same.
Description
Technical field
The utility model relates to a kind of device of photosignal detection technique field, particularly a kind of self-adapting following device for open grating reading head.
Background technology
The advantages such as grating is high with its resolution, measurement range large, wide dynamic range, accuracy of detection are high, fast response time, and be easy to realize digitized measurement and automatically control, and be widely used in numerically-controlled machine and field of precision measurement.Grating is primarily of scale grating and grating reading head two parts composition.Scale grating is generally fixed on lathe movable part, and grating reading head is arranged on lathe fixed part, and when detecting, grating reading head reads the optical signalling on scale grating, and converts thereof into electric signal, according to this electric signal, realizes the detection to displacement.
Due to the survey instrument that grating is very accurate, by the restriction of its fundamental measurement principle, in the installation process of grating reading head, need the strict distance controlling grating reading head and grating scale, to ensure signal quality, thus improve the measuring accuracy of optical grating measuring system.At present, the grating of each manufacturer manufacture both at home and abroad, require that the gap between grating reading head and grating scale is certain value, and its accuracy requirement is higher, this just proposes higher requirement to the installation of grating reading head.
Traditional grating reading head installation method is: be arranged on by read head on the support that can control five independent degree, namely adjusts the straight-line displacement of both direction and the angular displacement in three directions, when adjusting suitable, is fixed by read head.So just bring two problems: first, when adjusting certain direction, the direction mixed up often is made to change, so, lock bracket after all directions are adjusted, may before the position that mix up change, so just can not ensure that distance between grating reading head and grating scale is within error allowed band; Second, after bracket adjustment is good, in support, the relative position of all parts is determined, but the change of shape of guide rail, solid of revolution parts cross section, grating scale place circularity are uneven and ambient temperature change etc. may cause the spacing of grating reading head and grating scale to exceed error permissible value, adopt above installation method, grating reading head cannot regulate the distance between grating scale automatically, so just has a strong impact on the measuring accuracy of optical grating measuring system.
Summary of the invention
The purpose of this utility model not easily adjusts for existing grating reading head mounting structure, grating reading head is difficult to the change of self-adaptation extraneous factor and automatically adjusts the defect with the spacing of grating scale, provides a kind of and can overcome the deficiency of solid of revolution parts misalignment of axe or rail shapes change and remain grating reading head and the constant grating reading head self-adaptive hunting gear of grating scale relative distance in motion process.
The technical matters that the utility model solves is: design a kind of self-adapting following device for open grating reading head, solve existing grating reading head mounting structure not easily to adjust, grating reading head is difficult to the change of self-adaptation extraneous factor and automatically adjusts the problem with the defect of the spacing of grating scale; By spring force effect, roller is fitted roller rolling basal plane all the time, reduce the requirement of dimensional tolerence between grating reading head mounting base and grating scale installation base surface and form and position tolerance; Interference fit between guide pillar and guide pin bushing, makes reading head steadily carry out work; Transverse shifting and the circumferential movement leading thick stick supporting seat of spline slip shaft, when all ensure that grating reading head changes with extraneous circumstance, remain at best operational position.
The technical solution of the utility model is: a kind of self-adapting following device for open grating reading head, it is characterized in that, comprise spline slip shaft 14, guide pillar 11, guide pin bushing 9, keep circle 10, rolling body, spring 13, read head mounting base 24, lead thick stick supporting seat 16, lead thick stick 23, grating reading head 6 and bracket component; Described thick stick 23 of leading is fixed on and leads on thick stick supporting seat 16, leads thick stick supporting seat 16 and is located on read head mounting base 24; Described spline slip shaft 14 axis direction with lead thick stick 23 axes normal, spline slip shaft 14 one end has for leading the passage that thick stick 23 passes, and make spline slip shaft 14 can carry out transverse shifting leading on thick stick 23, the other end of spline slip shaft 14 has projection; Guide pillar 11 one end is connected in spline slip shaft 14 one end with projection, and guide pillar 11 is placed in guide pin bushing 9 inside, has and keep circle 10 between described guide pillar 11 and guide pin bushing 9, and keeps being uniformly distributed a circle rolling body in circle 10; Described guide pin bushing 9 one end has the groove matched with spline slip shaft 14 projection, and guide pin bushing 9 can be made when axially moving up and down along spline slip shaft 14, and projection end and groove concave surface leave gap; The other end is fixed with grating reading head 6 by bracket component; Spring 13 is enclosed within the outer wall of guide pillar 11, and its two ends have one end of projection and the reeded one end of guide pin bushing 9 only to lean on respectively with spline slip shaft 14; Lead thick stick supporting seat 16 and on read head mounting base, 24 can carry out circumferential movement around spline slip shaft 14.
Further technical scheme of the present utility model is: bracket component comprises read head support 4, support terminal pad 5, roller 2 and roller shaft 3; Roller 2 and roller shaft 3 are arranged on read head support 4 both sides; Support terminal pad 5 is fixed on above read head support 4.
Further technical scheme of the present utility model is: in the read head support that grating reading head 6 is fixed on bracket component 4, and guide pin bushing 9 is fixed on the support terminal pad 5 of bracket component.
Further technical scheme of the present utility model is: in the read head support that grating reading head 6 is fixed on bracket component 4, and guide pin bushing 9 is fixed on the support terminal pad 5 of bracket component.
During work, the described self-adapting following device being used for open grating reading head is placed in above grating scale, makes grating reading head 6 tentatively aim at grating scale.By manual shift spline slip shaft 14 leading the transverse shifting in thick stick 23 passage, and manual shift is led thick stick supporting seat 16 carry out circumferential movement to realize the position adjustment of grating reading head 6 around spline slip shaft 14 on read head mounting base 24.After adjusting to the right place, the utility model device is started working, and grating reading head starts reading.The gap formed between the groove concave surface of guide pin bushing 9 and spline slip shaft 14 projection, ensure that the space of guide pin bushing 9 when moving along the axial direction of spline slip shaft 14; Maintenance circle between guide pin bushing and guide pillar and rolling body, ensure that interference fit between the two, thus assurance device operationally, and the bracket component at grating reading head place strictly moves up and down not deflection along the normal direction of grating tape installation base surface.Due to the effect of spring 13 elastic force, roller and roller installation base surface are fitted all the time, even if therefore the piece surface circularity to be processed at grating scale place is uneven, grating reading head also can self-adaptation fluctuate, and ensure that grating reading head and grating scale constant distance.
Technique effect of the present utility model is: design a kind of self-adapting following device for open grating reading head, grating reading head bracket component is by the elastic force effect of spring, roller is fitted roller rolling basal plane all the time, thus ensure that grating reading head and grating scale installation base surface are all the time within the scope of grating reading head pin-point reading, greatly reduce the requirement of dimensional tolerence between read head mounting base and grating scale installation base surface and form and position tolerance.Guide pin bushing and guide pillar carry out interference fit, effectively ensure that to move up and down along the direction perpendicular to grating scale at magnetic grid read head, and deflection can not occur and rock, whole motion process safety and steady.Spline slip shaft along leading thick stick transverse shifting, can effectively can ensure that grating reading head is positioned at the optimum position of grating scale Width, accurately and reliably.Lead thick stick supporting seat and can carry out circumferential movement around spline slip shaft axis, ensure that grating reading head and grating scale Norma l deviation angle are in optimum position.
Accompanying drawing explanation
Fig. 1 is the utility model guide sleeve structure schematic diagram
Fig. 2 is the utility model spline slip shaft structural representation
Fig. 3 is the one-piece construction three-dimensional plot of the utility model when not installing conditioning module
Fig. 4 is the utility model one-piece construction front view
Fig. 5 is the utility model one-piece construction left view
Fig. 6 is the utility model bracket component partial enlarged drawing
Description of reference numerals: 1-revolving shaft; 2-roller; 3-roller shaft; 4-read head support; 5-support terminal pad; 6-grating reading head; 7-first hexagon socket cap head screw; 8-first sunk screw; 9-guide pin bushing; 10-keeps circle; 11-guide pillar; 12-second sunk screw; 13-spring; 14-spline slip shaft; 15-second hexagon socket cap head screw; 16-leads thick stick supporting seat; 17-read head device guard shield; 18-the 3rd hexagon socket cap head screw; 19-leads thick stick pressing plate; 20-holding screw; Six fillister head screws in 21-; 22-read head conditioning module; 23-leads thick stick; 24-read head mounting base; 25-trip bolt.
Embodiment
Below in conjunction with concrete embodiment, technical solutions of the utility model are further illustrated.
1. see Fig. 3-Fig. 6, the utility model devises the self-adapting following device for open grating reading head, comprises roller 2, roller shaft 3, read head support 4, support terminal pad 5, grating reading head 6, guide pin bushing 9, keeps circle 10, guide pillar 11, spring 13, spline slip shaft 14, leads thick stick supporting seat 16, read head protective cover 17, leads thick stick pressing plate 19, leads thick stick 23 etc.; Grating reading head 6 is arranged on read head support 4 by hexagon socket cap head screw 7, roller 2 and roller shaft 3 are arranged on read head support 4, support terminal pad 5 is fixed on read head support 4 by screw 8, and guide pin bushing 9 is fixed on support terminal pad 5 by screw 12.Keep circle 10 to be installed in guide pin bushing 9 and between guide pillar 11, keep being equipped with steel ball in circle 10, guide pin bushing 9 is coordinated with guide pillar 11 for interference fit.One end of guide pillar 11 is threaded connection in spline slip shaft 14, and its outer wall is equipped with spring 13.Lead thick stick 23 to be arranged in the passage of spline slip shaft 14, and be fixed on lead on thick stick supporting seat 16 by leading thick stick pressing plate 19.Read head protective cover 17 is fixed on read head mounting base 24 by hexagon socket cap head screw 15, prevents dust from entering, affects signal-obtaining.In the present embodiment, read head mounting base 24 is a circle, leads thick stick supporting seat 16 and is positioned on read head mounting base, and when artificially adjusting, it can be made to carry out circumferential movement around spline slip shaft 14.
2., see Fig. 2, in the present embodiment, be a rectangular parallelepiped above spline slip shaft 14, both sides corresponding on rectangular parallelepiped, side is groove, and side is columniform through hole; Below is a right cylinder, and there is projection right cylinder lower end.Make it possible to like this move back and forth along leading thick stick [23], thus regulate grating reading head 6 to make it the center facing grating scale.
3. see Fig. 1, there are two U-lags guide pin bushing 9 one end, can ensure that guide pin bushing has certain axial internal clearance on the one hand, can prevent read head support from rotating along guide pin bushing axis on the other hand.
4., see Fig. 1-Fig. 6, keep being equipped with steel ball in circle 10, by apolegamy steel ball size, guide pin bushing 9 and guide pillar 11 carry out interference fit.If clearance fit, guide pillar 11 is difficult to ensure with the right alignment of guide pin bushing 9, and so bracket component is when downward shift, and grating reading head 6 will produce angular deflection with normal place, makes grating reading head 6 can not remain vertical with grating scale; If the magnitude of interference is comparatively large, guide pin bushing 9 is difficult to move up and down.
Spring 13 is equipped with in guide pillar 11 outer end, to move or in rotary course relative to read head at revolving shaft 1, even if the piece surface that grating scale is housed has uneven fluctuating, roller 2 basal plane that also can roll with revolving shaft 1 upper roller 2 all the time under the elastic force effect of spring 13 is fitted, thus ensures the constant distance between grating reading head 6 and grating scale.
Spline slip shaft 14 can move along leading thick stick, with the center regulating grating reading head 6 to make it to be right against grating scale; Read head bracket component can along with the surface undulation situation of part, the changes such as the cross section circularity as axle is uneven, axis is beated, flatness change, and under guide pin bushing 9 with this condition of guide pillar 11 interference fit, conform needs, automatically strictly moves up and down not deflection along the normal direction of grating tape installation base surface; Roller 2 can under the effect of spring 13, and the surface of revolving shaft 1 of fitting all the time ensures that grating reading head 6 and grating scale relative distance are in error allowed band.
Adjustment and installation process of the present utility model is:
In revolving shaft 1 process, ensure the constant distance of roller rolling basal plane and grating installation base surface.
Grating reading head 6 is fixed on read head support 4 by the first hexagon socket cap head screw 7, roller 2 and roller shaft 3 are assembled on read head support 4 by the assembly relation shown in Fig. 1, be fixed on read head support 4 by support terminal pad 5 by the first sunk screw 8, guide pin bushing 9 is fixed on support terminal pad 5 by the second sunk screw 12.Now, bracket component has assembled.
Guide pillar 11 being connected on spline slip shaft 14 by threaded one end, keeping circle 10 to be assembled to guide pillar 11 outer end, then bracket component is assembled to maintenance circle 10 outer end, when assembling, keeping circle 10 planted agent to match steel ball size; After having assembled, must ensure that guide pin bushing 9 has certain axial internal clearance.
Being installed to by above assembly leads on thick stick 23, can slide along leading thick stick 23, will lead thick stick 23 and be installed to and lead on thick stick supporting seat 16, then, leads thick stick pressing plate 19 and is fixed on by the 3rd hexagon socket cap head screw 18 and leads on thick stick supporting seat 16, compress and lead thick stick 23.
Read head conditioning module 22 is that the signal condition that grating reading head 6 reads is become standard signal, and be supporting subsequent treatment module, it can be assemblied in the utility model device, also can be arranged on other and participate in the auxiliary relevant of reading
On parts.In the present embodiment, by read head conditioning module 22, by interior six fillister head screws 21, be arranged on above spline slip shaft 14.
Now, artificial adjustment spline slip shaft 14 moves axially along leading thick stick 23, observes conditioning box pilot lamp, when signal designation grating reading head 6 and grating scale alignment, and locking holding screw 20.
Then, thick stick supporting seat 16 is led in artificial adjustment, and make it around spline slip shaft 14 circumferential movement in error allowed band, grating reading head 6 is minimum with grating tape Norma l deviation angle, locking trip bolt 25.
Offset when position occurs for part and read head mounting base 24 size that grating scale is housed, if roller rolling basal plane moves, then whole bracket component also thereupon automatically on move, if roller rolling basal plane moves down, the elastic force of the spring 13 then outside guide pillar 11 makes roller pinch rollers rolling all the time basal plane, whole bracket component moves down thereupon automatically, so just achieves the self-adaptative adjustment function of grating reading head 6, ensures that grating reading head 6 remains constant with the spacing of grating scale thus.
When grating reading head 6 is adjusted to optimum Working, read head device protective cover 17 is fixed on read head mounting base 24 by the second hexagon socket cap head screw 15.
The self-adapting following device of the open grating reading head in the utility model not only can be installed on rotary part, line slideway is suitable for too, when rail shapes change or ambient temperature change, this open grating reading head self-adaptive hunting gear also can ensure that grating reading head 6 is in optimum Working, and adjustment principle is the same.
Claims (3)
1. the self-adapting following device for open grating reading head, it is characterized in that, comprise spline slip shaft (14), guide pillar (11), guide pin bushing (9), keep circle (10), rolling body, spring (13), read head mounting base (24), lead thick stick supporting seat (16), lead thick stick (23), grating reading head (6) and bracket component; Described thick stick (23) of leading is fixed on and leads on thick stick supporting seat (16), leads thick stick supporting seat (16) and is positioned on read head mounting base (24); Described spline slip shaft (14) axis direction with lead thick stick (23) axes normal, spline slip shaft (14) one end has for leading the passage that thick stick (23) passes, make spline slip shaft (14) can carry out transverse shifting leading on thick stick (23), the other end of spline slip shaft (14) has projection; Guide pillar (11) one end is connected in spline slip shaft (14) one end with projection, and guide pillar (11) is placed in guide pin bushing (9) inside, have between described guide pillar (11) and guide pin bushing (9) and keep circle (10), and keep in circle (10), being uniformly distributed a circle rolling body; Described guide pin bushing (9) one end has the groove matched with spline slip shaft (14) projection, and guide pin bushing (9) can be made when axially moving up and down along spline slip shaft (14), projection end and groove concave surface leave gap; The other end is fixed with grating reading head (6) by bracket component; Spring (13) is enclosed within the outer wall of guide pillar (11), and its two ends have one end of projection and guide pin bushing (9) reeded one end only to lean on spline slip shaft (14) respectively; Lead thick stick supporting seat (16) and on read head mounting base, (24) circumferential movement can be carried out around spline slip shaft (14).
2. a kind of self-adapting following device for open grating reading head as claimed in claim 1, it is characterized in that, bracket component comprises read head support (4), support terminal pad (5), roller (2) and roller shaft (3); Roller (2) and roller shaft (3) are arranged on read head support (4) both sides; Support terminal pad (5) is fixed on read head support (4) top.
3. a kind of self-adapting following device for open grating reading head as claimed in claim 1 or 2, it is characterized in that, grating reading head (6) is fixed on the read head support interior (4) of bracket component, and guide pin bushing (9) is fixed on the support terminal pad (5) of bracket component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420477661.9U CN204177343U (en) | 2014-08-22 | 2014-08-22 | A kind of self-adapting following device for open grating reading head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420477661.9U CN204177343U (en) | 2014-08-22 | 2014-08-22 | A kind of self-adapting following device for open grating reading head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204177343U true CN204177343U (en) | 2015-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420477661.9U Withdrawn - After Issue CN204177343U (en) | 2014-08-22 | 2014-08-22 | A kind of self-adapting following device for open grating reading head |
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| Country | Link |
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| CN (1) | CN204177343U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154862A (en) * | 2014-08-22 | 2014-11-19 | 西北工业大学 | Self-adaptive follow-up device for open type grating reading head |
-
2014
- 2014-08-22 CN CN201420477661.9U patent/CN204177343U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154862A (en) * | 2014-08-22 | 2014-11-19 | 西北工业大学 | Self-adaptive follow-up device for open type grating reading head |
| CN104154862B (en) * | 2014-08-22 | 2017-05-17 | 西北工业大学 | Self-adaptive follow-up device for open type grating reading head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150225 Effective date of abandoning: 20170517 |